Explictly require Gitlab::Utils in ProjectFeaturesCompatibility

For some reason Rails does not require it automatically when invoked via
rake task which cause tasks like seed_fu fail

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/models/concerns/project_features_compatibility.rb

@@ -2,6 +2,7 @@
 #
 # After migrating issues_enabled merge_requests_enabled builds_enabled snippets_enabled and wiki_enabled
 # fields to a new table "project_features", support for the old fields is still needed in the API.
+require 'gitlab/utils'
 
 module ProjectFeaturesCompatibility
   extend ActiveSupport::Concern